INNOGEN:
Original Celtic form of the misspelled English Shakespeare character name Imogen, derived from the Gaelic element inghean, meaning “girl, maiden.”

IRELAND:
English name derived from the country name, composed of the Irish goddess name Ériu and Old Saxon land “land,” hence “land of Ériu” or “land of peace.”

IRENE:
Latin form of Greek Eirênê, meaning “peace.” In mythology, this is the name of a goddess of peace.
IRIS (Ίρις): Greek name meaning “rainbow.” In mythology, this is the name of a rainbow goddess. In use by the English as a feminine name, and by the Jews as a unisex name.

IRMA:
Short form of longer German names beginning with Irm-, meaning “entire, whole.”

IRMGARD:
German name composed of the elements irmen “entire, whole” and gard “enclosure,” hence “entirely protected.”

ISABEL:
Originally a Spanish form of Latin Isabella, meaning “God is my oath.” It later became an English royal name and its popularity was enhanced by the fact that it was borne by Queen Isabella (1296-1358), despite the fact that she was a murderess.

ISABELLE:
French form of Latin Isabella, meaning “God is my oath.” In Arthurian legend, Isabelle of Cornwall is the name of the mother of Tristan.

ISADORA:
Variant spelling of Latin Isidora, meaning “gift of Isis.”

ISCAH:
Anglicized form of Hebrew Yickah, meaning “one who beholds” or “one who looks out.” In the bible, this is the name of the sister of Lot. Contracted form of English Isaaca, meaning “he will laugh.”